I am pleased that vertically scrolling titles (e.g. end credits) are facilitated.
I have found them helpful in a 'tutorial' video to provide a more lengthy explanation than a series of short one line captions work well for.
A couple of additions would make them significantly more helpful to me.
a) Having a box to click if you want to choose as an option to have the last full page of text to stay on the screen for a readable length of time. (Currently the text scrolls off the top of the screen always, I think.) Holding the last page might require a timer box to tell how many frames or seconds to hold the last screen. This of course would cause the text to scroll faster but we adjust the length for speed already, so that isn't really a complication.
(I know there's a workaround to copy the last page to another title but getting things to line up is dicey and therefor very timestaking.)
b) Having the title pop-up include a recommendation of how long the clip should be for normal 'human factors' reading speed would be a very nice touch. And would probably improve a lot of videos. Easy to ignore if you 'know better' of course.